A novel approach to developing a reusable marine macro-algae adsorbent with chitosan and ferric oxide for simultaneous efficient heavy metal removal and easy magnetic separation. (July 2018)

• Record Type: Journal Article
• Authors: Son, Eun-Bi; Poo, Kyung-Min; Mohamed, Hend Omar; Choi, Yun-Jeong; Cho, Wan-Cheol; Chae, Kyu-Jung
• Is Part Of: Bioresource technology. Volume 259(2018)
• Page Start: 381
• Page End: 387
• Publication Date: 2018-07
• Subjects: Chitosan -- Marine macro-algae biochar -- Reusability -- Metal adsorption -- Magnetic separation; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.03.077
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: Chi-KBm was synthesized using simple, effective and cost less procedures. Chi-KBm achieved excellent Cu 2+ removal from aqueous solution compared to KBm . Nitrogen groups played a critical role to enhance Cu 2+ removal efficiency. Chi-KBm exhibited more than 99.8% separation efficiency with external magnet. Chi-KBm is an effective heavy metals adsorbent with easy magnetic separation. Abstract: Chitosan modified magnetic kelp biochar (Chi-KBm ) was successfully synthesized for efficient removal of heavy metals (Cu 2+ ) from wastewater. Interestingly, the characterization results indicated that Chi-KBm showed 6 times higher surface area (6.17 m 2 /g) than the pristine magnetic kelp biochar KBm (0.97 m 2 /g). In addition, new functional groups, such as NH and CN group, have been created on the surface of biochar as a result of chitosan modification process, which in turns led to improve the Cu 2+ adsorption capacity. The effect of pH and chitosan loading on heavy metal adsorption, and competition reaction of different metal ions adsorption were also investigated. Chi-KBm exhibited a separation efficiency of more than 99.8%, which allows to recovery and reusability of the adsorbent material and heavy metals simultaneously. Overall, this study highlighted the Chi-KBm is a promise adsorbent for heavy metal removal without sacrificing of the separation ability using magnetism.